3984807 has 4 divisors (see below), whose sum is σ = 5313080. Its totient is φ = 2656536.

The previous prime is 3984793. The next prime is 3984809. The reversal of 3984807 is 7084893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7084893 = 3 ⋅2361631.

It is not a de Polignac number, because 3984807 - 2⁴ = 3984791 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3984809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 664132 + ... + 664137.

It is an arithmetic number, because the mean of its divisors is an integer number (1328270).

Almost surely, 2^3984807 is an apocalyptic number.

3984807 is a deficient number, since it is larger than the sum of its proper divisors (1328273).

3984807 is a wasteful number, since it uses less digits than its factorization.

3984807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328272.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 3984807 is about 1996.1981364584. The cubic root of 3984807 is about 158.5388720018.

The spelling of 3984807 in words is "three million, nine hundred eighty-four thousand, eight hundred seven".